Laparoscopic surgery also referred to as minimally invasive surgery(MIS) describes the performance of surgical procedures with the assistance of a video camera and several thin instruments. During the surgical procedure, small incisions of up to half an inch are made and plastic tubes called ports are placed through these incisions. The camera and the instruments are then introduced through the...

The real-time development of multi-camera systems is a great challenge. Synchronization and large data rates of the cameras adds to the complexity of these systems as well. The complexity of such system also increases as the number of their incorporating cameras increases. The customary approach to implementation of such system is a central type, where all the raw stream from the camera are fir...

An interferometric method that was used to measure the electro-optic s(11) coefficient of nitrobenzene is presented. The method uses a Mach-Zehnder interferometer arrangement that produces a finite fringe interferogram. A nitrobenzene Kerr cell is placed in one arm of the interferometer and a pulsed high voltage is applied to the two rectangular electrodes. The voltage application causes the fr...

Camera-based document image retrieval is a task of searching document images from the database based on query images captured using digital cameras. For this task, it is required to solve the problem of “perspective distortion” of images, as well as to establish a way of matching document images efficiently. To solve these problems we have proposed a method called Locally Likely Arrangement Has...

In Precision Agriculture, images coming from camera-based sensors are commonly used for weed identification and crop line detection, either to apply specific treatments or for vehicle guidance purposes. Accuracy of identification and detection is an important issue to be addressed in image processing. There are two main types of parameters affecting the accuracy of the images, namely: (a) extri...

Minimally invasive surgery (MIS) is performed for a growing number of treatments. Whereas open surgery requires large incisions, MIS relies on small incisions through which instruments are inserted and tissues are visualized with a camera. MIS results in benefits for patients compared with open surgery, but degrades the surgeon's perceptual-motor performance. We used a laparoscopic simulator to...

Positional tracking can be implemented with a variety of technologies. Commercially-available systems include mechanical trackers, magnetic trackers, ultrasonic trackers, and GPS or WIFI-based tracking. The most widely used technology, however, is optical tracking. In optical tracking, one or more cameras observe a set of reference points, for example infrared LEDs or actively illuminated retro...

The capturing of panoramic 360◦ images has become a popular photographic technique. While a complete 360◦ view gives an impressive view of the environment, many people have difficulties to understand the spatial scene arrangement from this flat image. For this reason, we present and discuss various visualizations of panoramic images. Furthermore, we propose an alternative visualization for pano...

digital cameras, hyperspectral, multispectral, sensors, simulation, modelling, calibration This paper describes (a) models for digital cameras, (b) the calibration of the spectral response of a camera and (c) the performance of an image capture simulator. The general model underlying the simulator assumes that the image capture device contains multiple classes of sensors with different spectral...

The advent of spacecraft mobile robots—free-flying sensor platforms and communications devices intended to accompany astronauts or remotely operate on space missions both inside and outside of a spacecraft—has demanded the development of a simple and effective navigation schema. One such system under exploration involves the use of a laser-camera arrangement to predict relative positioning of t...